NO bro solid-9210 is still available a members in other forum has just posted a thread like you of new 9210 box. He also get new box.
Secondly not only software can play AC3 or AAC, the main thing we require is A Audio CHIP supporting the certain Hardware + software, So didn't know that 9048 has the dolby digital supported Audio Chip or not ?
If it have the Chip then it should have supported AC3 audio codecs ok. Rest you can give atry to this box with 9300.abs file via USB, But you must take care to make a DUMP copy of your box Orignal soft ok. If any this goes wrong or you didn't like the software then you can again install ORG soft ok.